Launching terror attacks is pityfully easy.
Armed with only a small amount of knowledge, freely available not only online, but in schools, colleges, universities, public libraries, and even museums, it is incredibly easy to engineer chemical or biological weapons on a scale to injure hundreds.
A terrorist organisation would only need a few dozen people to carry out such attacks simultaneously to kill thousands and plunge the country into complete and utter chaos (as the autrhorities would be completely unable to cope).
The fact that such an attack has not yet taken place can mean one of several things:
1) Whilst there are many people willing to preach terror, there are very few, if any, actually prepared to carry it out in this country.
2) There are terrorists willing and able to launch attacks in this country, but they lack the numbers for a large scale attack and/or are biding their time for an attack to cause maximum impact.
3) The Government's aggressive and secretive anti-Terror campaign is successfully suppressing all terrorists in the UK.
Given that it would only take a single person to make and detonate a bomb in a crowded place, and given that no such attack has yet happened, I find it difficult to believe that the Government's anti-Terror campaign is responsible for preventing these attacks, as it would involve espionage on the population to such a degree that they see and hear everything that everyone does.
Let us not forget that there are more than just Islamic Extremists and the IRA who would execute a terrorist attack in the UK.
Can our Government, who are continually showing themselves to be inept and incompetent, really possess the skill, aptitude, and abilty to seek out and stop every single potential terrorist?
Much more likely that the actual terror threat is extremely low - unless, or course, the Government is only *pretending* to be utterly incompetent, to front a hidden agenda - conspiracy theories abound!